NEET Biology question
Consider the following statements and select the correct option stating which one is true (T) and which one is false (F). (i) Cotton plants do not depend on photoperiod (ii) Phytochrome is a pigment protein complex which exists in two inter-convertible forms — and (iii) Tobacco produces flowers after getting the inductive cycles of long dark periods and short photoperiods (iv) 2,4-D acts as a weedicide to remove broad leaved weeds (v) Auxins promote growth of lateral buds whereas cytokinins inhibit it
Solution
(i) Cotton is a day-neutral plant, so it is correctly described as not depending on photoperiod to flower — True. (ii) Phytochrome genuinely exists as the photo-interconvertible Pr/Pfr pair — True. (iii) The Maryland Mammoth tobacco variety (a short day plant) requires long dark periods/short photoperiods to flower —
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